ECONOMY MADNESS? THIS IS … FIXED

Essentials/src/com/earth2me/essentials/EssentialsConf.java

@@ -5,6 +5,9 @@ import static com.earth2me.essentials.I18n._;
 import com.earth2me.essentials.api.InvalidWorldException;
 import com.google.common.io.Files;
 import java.io.*;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.math.MathContext;
 import java.nio.ByteBuffer;
 import java.nio.CharBuffer;
 import java.nio.charset.Charset;
@@ -493,6 +496,11 @@ public class EssentialsConf extends YamlConfiguration
 	{
 		return get(path);
 	}
+	
+	public void setProperty(final String path, final BigDecimal bigDecimal)
+	{
+		set(path, bigDecimal.toString());
+	}
 
 	public void setProperty(String path, Object object)
 	{
@@ -515,6 +523,32 @@ public class EssentialsConf extends YamlConfiguration
 	{
 		return super.get(path, def);
 	}
+	
+	
+	public synchronized BigDecimal getBigDecimal(final String path, final BigDecimal def)
+	{
+		final String input = super.getString(path);
+		return toBigDecimal(input, def);
+	}
+	
+	public static BigDecimal toBigDecimal(final String input, final BigDecimal def)
+	{
+		if (input == null || input.isEmpty())
+		{
+			return def;
+		}
+		else
+		{
+			try
+			{
+				return new BigDecimal(input, MathContext.DECIMAL128);
+			}
+			catch (ArithmeticException e)
+			{
+				return def;
+			}
+		}
+	}
 
 	@Override
 	public synchronized boolean getBoolean(String path)

Essentials/src/com/earth2me/essentials/ISettings.java

@@ -79,7 +79,7 @@ public interface ISettings extends IConf
 
 	int getSpawnMobLimit();
 
-	int getStartingBalance();
+	BigDecimal getStartingBalance();
 
 	double getTeleportCooldown();
 

Essentials/src/com/earth2me/essentials/Kit.java

@@ -33,7 +33,7 @@ public class Kit
 				{
 					String cost = "";
 					BigDecimal costPrice = new Trade("kit-" + kitItem.toLowerCase(Locale.ENGLISH), ess).getCommandCost(user);
-					if (costPrice.compareTo(BigDecimal.ZERO) > 0)
+					if (costPrice.signum() > 0)
 					{
 						cost = _("kitCost", Util.displayCurrency(costPrice, ess));
 					}

Essentials/src/com/earth2me/essentials/Settings.java

@@ -113,9 +113,9 @@ public class Settings implements ISettings
 	}
 
 	@Override
-	public int getStartingBalance()
+	public BigDecimal getStartingBalance()
 	{
-		return config.getInt("starting-balance", 0);
+		return config.getBigDecimal("starting-balance", BigDecimal.ZERO);
 	}
 
 	@Override
@@ -234,7 +234,7 @@ public class Settings implements ISettings
 		name = name.replace('.', '_').replace('/', '_');
 		if (commandCosts != null)
 		{
-			return BigDecimal.valueOf(commandCosts.getDouble(name, 0.0));
+			return EssentialsConf.toBigDecimal(commandCosts.getString(name), BigDecimal.ZERO);
 		}
 		return BigDecimal.ZERO;
 	}
@@ -690,42 +690,33 @@ public class Settings implements ISettings
 	{
 		return config.getBoolean(configName, def);
 	}
-	private final static double MAXMONEY = 10000000000000.0;
+	private final static BigDecimal MAXMONEY = new BigDecimal("10000000000000");
-	private BigDecimal maxMoney = BigDecimal.valueOf(MAXMONEY);
+	private BigDecimal maxMoney = MAXMONEY;
 
 	private BigDecimal _getMaxMoney()
 	{
-		double max = config.getDouble("max-money", MAXMONEY);
+		return config.getBigDecimal("max-money", MAXMONEY);
-		if (Math.abs(max) > MAXMONEY)
-		{
-			max = max < 0 ? -MAXMONEY : MAXMONEY;
-		}
-		return BigDecimal.valueOf(max);
 	}
-	
+
-		@Override
+	@Override
 	public BigDecimal getMaxMoney()
 	{
 		return maxMoney;
 	}
-	private final static double MINMONEY = -10000000000000.0;
+	private final static BigDecimal MINMONEY = new BigDecimal("-10000000000000");
-	private BigDecimal minMoney = BigDecimal.valueOf(MINMONEY);
+	private BigDecimal minMoney = MINMONEY;
 
 	private BigDecimal _getMinMoney()
 	{
-		double min = config.getDouble("min-money", MINMONEY);
+		BigDecimal min = config.getBigDecimal("min-money", MINMONEY);
-		if (min > 0)
+		if (min.signum() > 0)
 		{
-			min = -min;
+			min = min.negate();
 		}
-		if (min < MINMONEY)
+		return min;
-		{
-			min = MINMONEY;
-		}
-		return BigDecimal.valueOf(min);
 	}
-	
+
-		@Override
+	@Override
 	public BigDecimal getMinMoney()
 	{
 		return minMoney;

Essentials/src/com/earth2me/essentials/Trade.java

@@ -79,7 +79,7 @@ public class Trade
 		}
 
 		if (getMoney() != null
-			&& getMoney().compareTo(BigDecimal.ZERO) > 0
+			&& getMoney().signum() > 0
 			&& !user.canAfford(getMoney()))
 		{
 			throw new ChargeException(_("notEnoughMoney"));
@@ -93,7 +93,7 @@ public class Trade
 
 		BigDecimal money;
 		if (command != null && !command.isEmpty()
-			&& (money = getCommandCost(user)).compareTo(BigDecimal.ZERO) > 0
+			&& (money = getCommandCost(user)).signum() > 0
 			&& !user.canAfford(money))
 		{
 			throw new ChargeException(_("notEnoughMoney"));
@@ -114,7 +114,7 @@ public class Trade
 	public boolean pay(final IUser user, final boolean dropItems)
 	{
 		boolean success = true;
-		if (getMoney() != null && getMoney().compareTo(BigDecimal.ZERO) > 0)
+		if (getMoney() != null && getMoney().signum() > 0)
 		{
 			user.giveMoney(getMoney());
 		}
@@ -166,7 +166,7 @@ public class Trade
 
 		if (getMoney() != null)
 		{
-			if (!user.canAfford(getMoney()) && getMoney().compareTo(BigDecimal.ZERO) > 0)
+			if (!user.canAfford(getMoney()) && getMoney().signum() > 0)
 			{
 				throw new ChargeException(_("notEnoughMoney"));
 			}

Essentials/src/com/earth2me/essentials/User.java

@@ -187,7 +187,7 @@ public class User extends UserData implements Comparable<User>, IReplyTo, IUser
 
 	public boolean canAfford(final BigDecimal cost, final boolean permcheck)
 	{
-		if (cost.compareTo(BigDecimal.ZERO) <= 0)			
+		if (cost.signum() <= 0)			
 		{
 			return true;
 		}
@@ -196,7 +196,7 @@ public class User extends UserData implements Comparable<User>, IReplyTo, IUser
 		{
 			return (remainingBalance.compareTo(ess.getSettings().getMinMoney()) >= 0);
 		}
-		return (remainingBalance.compareTo(BigDecimal.ZERO) >= 0);
+		return (remainingBalance.signum() >= 0);
 	}
 
 	public void dispose()

Essentials/src/com/earth2me/essentials/UserData.java

@@ -71,15 +71,14 @@ public abstract class UserData extends PlayerExtension implements IConf
 
 	private BigDecimal _getMoney()
 	{
-		double bal = ess.getSettings().getStartingBalance();
+		BigDecimal result = ess.getSettings().getStartingBalance();
 		BigDecimal maxMoney = ess.getSettings().getMaxMoney();
 		BigDecimal minMoney = ess.getSettings().getMinMoney();
 
 		if (config.hasProperty("money"))
 		{
-			bal = config.getDouble("money", bal);
+			result = config.getBigDecimal("money", result);
 		}
-		BigDecimal result = BigDecimal.valueOf(bal);
 		if (result.compareTo(maxMoney) > 0)
 		{
 			result = maxMoney;

Essentials/src/com/earth2me/essentials/Worth.java

@@ -22,25 +22,25 @@ public class Worth implements IConf
 	public BigDecimal getPrice(ItemStack itemStack)
 	{
 		String itemname = itemStack.getType().toString().toLowerCase(Locale.ENGLISH).replace("_", "");
-		double result;
+		BigDecimal result;
-		result = config.getDouble("worth." + itemname + "." + itemStack.getDurability(), Double.NaN);
+		result = config.getBigDecimal("worth." + itemname + "." + itemStack.getDurability(), BigDecimal.ONE.negate());
-		if (Double.isNaN(result))
+		if (result.signum() <= 0)
 		{
-			result = config.getDouble("worth." + itemname + ".0", Double.NaN);
+			result = config.getBigDecimal("worth." + itemname + ".0", BigDecimal.ONE.negate());
 		}
-		if (Double.isNaN(result))
+		if (result.signum() <= 0)
 		{
-			result = config.getDouble("worth." + itemname, Double.NaN);
+			result = config.getBigDecimal("worth." + itemname, BigDecimal.ONE.negate());
 		}
-		if (Double.isNaN(result))
+		if (result.signum() <= 0)
 		{
-			result = config.getDouble("worth-" + itemStack.getTypeId(), Double.NaN);
+			result = config.getBigDecimal("worth-" + itemStack.getTypeId(), BigDecimal.ONE.negate());
 		}
-		if (Double.isNaN(result))
+		if (result.signum() <= 0)
 		{
 			return null;
 		}
-		return BigDecimal.valueOf(result);
+		return result;
 	}
 
 	public void setPrice(ItemStack itemStack, double price)

Essentials/src/com/earth2me/essentials/api/Economy.java

@@ -7,13 +7,13 @@ import com.earth2me.essentials.User;
 import com.earth2me.essentials.Util;
 import java.io.File;
 import java.math.BigDecimal;
+import java.math.MathContext;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
 
 /**
- * Instead of using this api directly, we recommend to use the register plugin:
+ * Instead of using this api directly, we recommend to use the register plugin: http://bit.ly/RegisterMethod
- * http://bit.ly/RegisterMethod
  */
 public final class Economy
 {
@@ -23,6 +23,7 @@ public final class Economy
 	private static final Logger logger = Logger.getLogger("Minecraft");
 	private static IEssentials ess;
 	private static final String noCallBeforeLoad = "Essentials API is called before Essentials is loaded.";
+	public static final MathContext MATH_CONTEXT = MathContext.DECIMAL128;
 
 	/**
 	 * @param aEss the ess to set
@@ -77,100 +78,177 @@ public final class Economy
 
 	/**
 	 * Returns the balance of a user
+	 *
 	 * @param name Name of the user
 	 * @return balance
-	 * @throws UserDoesNotExistException 
+	 * @throws UserDoesNotExistException
 	 */
+	@Deprecated
 	public static double getMoney(String name) throws UserDoesNotExistException
+	{
+		return getMoneyExact(name).doubleValue();
+	}
+
+	public static BigDecimal getMoneyExact(String name) throws UserDoesNotExistException
 	{
 		User user = getUserByName(name);
 		if (user == null)
 		{
 			throw new UserDoesNotExistException(name);
 		}
-		return user.getMoney().doubleValue();
+		return user.getMoney();
 	}
 
 	/**
 	 * Sets the balance of a user
+	 *
 	 * @param name Name of the user
 	 * @param balance The balance you want to set
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
 	 */
+	@Deprecated
 	public static void setMoney(String name, double balance) throws UserDoesNotExistException, NoLoanPermittedException
+	{
+		try
+		{
+			setMoney(name, BigDecimal.valueOf(balance));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to set balance of " + name + " to " + balance + ": " + e.getMessage(), e);
+		}
+	}
+
+	public static void setMoney(String name, BigDecimal balance) throws UserDoesNotExistException, NoLoanPermittedException
 	{
 		User user = getUserByName(name);
-		BigDecimal newBalance = BigDecimal.valueOf(balance);
 		if (user == null)
 		{
 			throw new UserDoesNotExistException(name);
 		}
-		if (newBalance.compareTo(ess.getSettings().getMinMoney()) < 0)
+		if (balance.compareTo(ess.getSettings().getMinMoney()) < 0)
 		{
 			throw new NoLoanPermittedException();
 		}
-		if (newBalance.compareTo(BigDecimal.ZERO) < 0 && !user.isAuthorized("essentials.eco.loan"))
+		if (balance.signum() < 0 && !user.isAuthorized("essentials.eco.loan"))
 		{
 			throw new NoLoanPermittedException();
 		}
-		user.setMoney(newBalance);
+		user.setMoney(balance);
 	}
 
 	/**
 	 * Adds money to the balance of a user
+	 *
 	 * @param name Name of the user
 	 * @param amount The money you want to add
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
 	 */
+	@Deprecated
 	public static void add(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
 	{
-		double result = getMoney(name) + amount;
+		try
+		{
+			add(name, BigDecimal.valueOf(amount));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to add " + amount + " to balance of " + name + ": " + e.getMessage(), e);
+		}
+	}
+
+	public static void add(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
+	{
+		BigDecimal result = getMoneyExact(name).add(amount, MATH_CONTEXT);
 		setMoney(name, result);
 	}
 
 	/**
 	 * Substracts money from the balance of a user
+	 *
 	 * @param name Name of the user
 	 * @param amount The money you want to substract
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
 	 */
+	@Deprecated
 	public static void subtract(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
 	{
-		double result = getMoney(name) - amount;
+		try
+		{
+			substract(name, BigDecimal.valueOf(amount));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to substract " + amount + " of balance of " + name + ": " + e.getMessage(), e);
+		}
+	}
+
+	public static void substract(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
+	{
+		BigDecimal result = getMoneyExact(name).subtract(amount, MATH_CONTEXT);
 		setMoney(name, result);
 	}
 
 	/**
 	 * Divides the balance of a user by a value
+	 *
 	 * @param name Name of the user
 	 * @param value The balance is divided by this value
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
 	 */
-	public static void divide(String name, double value) throws UserDoesNotExistException, NoLoanPermittedException
+	@Deprecated
+	public static void divide(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
 	{
-		double result = getMoney(name) / value;
+		try
+		{
+			divide(name, BigDecimal.valueOf(amount));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to divide balance of " + name + " by " + amount + ": " + e.getMessage(), e);
+		}
+	}
+
+	public static void divide(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
+	{
+		BigDecimal result = getMoneyExact(name).divide(amount, MATH_CONTEXT);
 		setMoney(name, result);
 	}
 
 	/**
 	 * Multiplies the balance of a user by a value
+	 *
 	 * @param name Name of the user
 	 * @param value The balance is multiplied by this value
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
 	 */
-	public static void multiply(String name, double value) throws UserDoesNotExistException, NoLoanPermittedException
+	@Deprecated
+	public static void multiply(String name, double amount) throws UserDoesNotExistException, NoLoanPermittedException
 	{
-		double result = getMoney(name) * value;
+		try
+		{
+			multiply(name, BigDecimal.valueOf(amount));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to multiply balance of " + name + " by " + amount + ": " + e.getMessage(), e);
+		}
+	}
+
+	public static void multiply(String name, BigDecimal amount) throws UserDoesNotExistException, NoLoanPermittedException, ArithmeticException
+	{
+		BigDecimal result = getMoneyExact(name).multiply(amount, MATH_CONTEXT);
 		setMoney(name, result);
 	}
 
 	/**
 	 * Resets the balance of a user to the starting balance
+	 *
 	 * @param name Name of the user
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 * @throws NoLoanPermittedException If the user is not allowed to have a negative balance
@@ -190,9 +268,23 @@ public final class Economy
 	 * @return true, if the user has more or an equal amount of money
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 */
+	@Deprecated
 	public static boolean hasEnough(String name, double amount) throws UserDoesNotExistException
 	{
-		return amount <= getMoney(name);
+		try
+		{
+			return hasEnough(name, BigDecimal.valueOf(amount));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to compare balance of " + name + " with " + amount + ": " + e.getMessage(), e);
+			return false;
+		}
+	}
+
+	public static boolean hasEnough(String name, BigDecimal amount) throws UserDoesNotExistException, ArithmeticException
+	{
+		return amount.compareTo(getMoneyExact(name)) <= 0;
 	}
 
 	/**
@@ -201,9 +293,23 @@ public final class Economy
 	 * @return true, if the user has more money
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 */
+	@Deprecated
 	public static boolean hasMore(String name, double amount) throws UserDoesNotExistException
 	{
-		return amount < getMoney(name);
+		try
+		{
+			return hasMore(name, BigDecimal.valueOf(amount));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to compare balance of " + name + " with " + amount + ": " + e.getMessage(), e);
+			return false;
+		}
+	}
+
+	public static boolean hasMore(String name, BigDecimal amount) throws UserDoesNotExistException, ArithmeticException
+	{
+		return amount.compareTo(getMoneyExact(name)) < 0;
 	}
 
 	/**
@@ -212,39 +318,69 @@ public final class Economy
 	 * @return true, if the user has less money
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 */
+	@Deprecated
 	public static boolean hasLess(String name, double amount) throws UserDoesNotExistException
 	{
-		return amount > getMoney(name);
+		try
+		{
+			return hasLess(name, BigDecimal.valueOf(amount));
+		}
+		catch (ArithmeticException e)
+		{
+			logger.log(Level.WARNING, "Failed to compare balance of " + name + " with " + amount + ": " + e.getMessage(), e);
+			return false;
+		}
+	}
+
+	public static boolean hasLess(String name, BigDecimal amount) throws UserDoesNotExistException, ArithmeticException
+	{
+		return amount.compareTo(getMoneyExact(name)) > 0;
 	}
 
 	/**
 	 * Test if the user has a negative balance
+	 *
 	 * @param name Name of the user
 	 * @return true, if the user has a negative balance
 	 * @throws UserDoesNotExistException If a user by that name does not exists
 	 */
 	public static boolean isNegative(String name) throws UserDoesNotExistException
 	{
-		return getMoney(name) < 0.0;
+		return getMoneyExact(name).signum() < 0;
 	}
 
 	/**
-	 * Formats the amount of money like all other Essentials functions.
+	 * Formats the amount of money like all other Essentials functions. Example: $100000 or $12345.67
-	 * Example: $100000 or $12345.67
+	 *
 	 * @param amount The amount of money
 	 * @return Formatted money
 	 */
+	@Deprecated
 	public static String format(double amount)
+	{
+		try
+		{
+			return format(BigDecimal.valueOf(amount));
+		}
+		catch (NumberFormatException e)
+		{
+			logger.log(Level.WARNING, "Failed to disply " + amount + ": " + e.getMessage(), e);
+			return "NaN";
+		}
+	}
+
+	public static String format(BigDecimal amount)
 	{
 		if (ess == null)
 		{
 			throw new RuntimeException(noCallBeforeLoad);
 		}
-		return Util.displayCurrency(BigDecimal.valueOf(amount), ess);
+		return Util.displayCurrency(amount, ess);
 	}
 
 	/**
 	 * Test if a player exists to avoid the UserDoesNotExistException
+	 *
 	 * @param name Name of the user
 	 * @return true, if the user exists
 	 */
@@ -255,9 +391,10 @@ public final class Economy
 
 	/**
 	 * Test if a player is a npc
+	 *
 	 * @param name Name of the player
 	 * @return true, if it's a npc
-	 * @throws UserDoesNotExistException 
+	 * @throws UserDoesNotExistException
 	 */
 	public static boolean isNPC(String name) throws UserDoesNotExistException
 	{
@@ -271,6 +408,7 @@ public final class Economy
 
 	/**
 	 * Creates dummy files for a npc, if there is no player yet with that name.
+	 *
 	 * @param name Name of the player
 	 * @return true, if a new npc was created
 	 */
@@ -286,9 +424,10 @@ public final class Economy
 	}
 
 	/**
-	 * Deletes a user, if it is marked as npc. 
+	 * Deletes a user, if it is marked as npc.
+	 *
 	 * @param name Name of the player
-	 * @throws UserDoesNotExistException 
+	 * @throws UserDoesNotExistException
 	 */
 	public static void removeNPC(String name) throws UserDoesNotExistException
 	{

Essentials/src/com/earth2me/essentials/commands/Commandeco.java

@@ -26,7 +26,7 @@ public class Commandeco extends EssentialsCommand
 		}
 
 		Commandeco.EcoCommands cmd;
-		BigDecimal startingBalance = new BigDecimal(ess.getSettings().getStartingBalance());
+		BigDecimal startingBalance = ess.getSettings().getStartingBalance();
 		BigDecimal amount;
 		BigDecimal broadcast = null;
 		BigDecimal broadcastAll = null;

Essentials/src/com/earth2me/essentials/signs/EssentialsSign.java

@@ -18,7 +18,8 @@ import org.bukkit.inventory.ItemStack;
 public class EssentialsSign
 {
 	private static final Set<Material> EMPTY_SET = new HashSet<Material>();
-
+	protected static final BigDecimal MINTRANSACTION = new BigDecimal("0.01");
+	
 	protected transient final String signName;
 
 	public EssentialsSign(final String signName)
@@ -68,8 +69,9 @@ public class EssentialsSign
 	{
 		return _("signFormatTemplate", this.signName);
 	}
-	
+
-	public String getName() {
+	public String getName()
+	{
 		return this.signName;
 	}
 
@@ -89,7 +91,7 @@ public class EssentialsSign
 		try
 		{
 			return (!user.isDead() && (user.isAuthorized("essentials.signs." + signName.toLowerCase(Locale.ENGLISH) + ".use")
-					|| user.isAuthorized("essentials.signs.use." + signName.toLowerCase(Locale.ENGLISH))))
+									   || user.isAuthorized("essentials.signs.use." + signName.toLowerCase(Locale.ENGLISH))))
 				   && onSignInteract(sign, user, getUsername(user), ess);
 		}
 		catch (ChargeException ex)
@@ -264,7 +266,7 @@ public class EssentialsSign
 	{
 		return EMPTY_SET;
 	}
-	
+
 	public boolean areHeavyEventRequired()
 	{
 		return false;
@@ -371,24 +373,28 @@ public class EssentialsSign
 	protected final BigDecimal getMoney(final String line) throws SignException
 	{
 		final boolean isMoney = line.matches("^[^0-9-\\.][\\.0-9]+$");
-		return isMoney ? BigDecimal.valueOf(getDoublePositive(line.substring(1))) : null;
+		return isMoney ? getBigDecimalPositive(line.substring(1)) : null;
 	}
 
-	protected final Double getDoublePositive(final String line) throws SignException
+	protected final BigDecimal getBigDecimalPositive(final String line) throws SignException
 	{
-		final double quantity = getDouble(line);
+		final BigDecimal quantity = getBigDecimal(line);
-		if (Math.round(quantity * 100.0) < 1.0)
+		if (quantity.compareTo(MINTRANSACTION) < 0)
 		{
 			throw new SignException(_("moreThanZero"));
 		}
 		return quantity;
 	}
 
-	protected final Double getDouble(final String line) throws SignException
+	protected final BigDecimal getBigDecimal(final String line) throws SignException
 	{
 		try
 		{
-			return Double.parseDouble(line);
+			return new BigDecimal(line);
+		}
+		catch (ArithmeticException ex)
+		{
+			throw new SignException(ex.getMessage(), ex);
 		}
 		catch (NumberFormatException ex)
 		{
@@ -468,7 +474,7 @@ public class EssentialsSign
 		public final void setLine(final int index, final String text)
 		{
 			event.setLine(index, text);
-			sign.setLine(index, text);			
+			sign.setLine(index, text);
 			updateSign();
 		}
 

Essentials/src/com/earth2me/essentials/signs/SignTrade.java

@@ -13,7 +13,6 @@ public class SignTrade extends EssentialsSign
 	{
 		super("Trade");
 	}
-	static final BigDecimal MINTRANSACTION = BigDecimal.valueOf(0.01);
 
 	@Override
 	protected boolean onSignCreate(final ISign sign, final User player, final String username, final IEssentials ess) throws SignException, ChargeException
@@ -154,7 +153,7 @@ public class SignTrade extends EssentialsSign
 		if (split.length == 2 && amountNeeded)
 		{
 			final BigDecimal money = getMoney(split[0]);
-			BigDecimal amount = BigDecimal.valueOf(getDoublePositive(split[1]));
+			BigDecimal amount = getBigDecimalPositive(split[1]);
 			if (money != null && amount != null)
 			{
 				amount = amount.subtract(amount.remainder(money));
@@ -223,7 +222,7 @@ public class SignTrade extends EssentialsSign
 			try
 			{
 				final BigDecimal money = getMoney(split[0]);
-				final BigDecimal amount = BigDecimal.valueOf(notEmpty ? getDoublePositive(split[1]) : getDouble(split[1]));
+				final BigDecimal amount = notEmpty ? getBigDecimalPositive(split[1]) : getBigDecimal(split[1]);
 				if (money != null && amount != null)
 				{
 					return new Trade(fullAmount ? amount : money, ess);
@@ -270,17 +269,17 @@ public class SignTrade extends EssentialsSign
 		final BigDecimal money = trade.getMoney();
 		if (money != null)
 		{
-			changeAmount(sign, index, -money.doubleValue(), ess);
+			changeAmount(sign, index, money.negate(), ess);
 		}
 		final ItemStack item = trade.getItemStack();
 		if (item != null)
 		{
-			changeAmount(sign, index, -item.getAmount(), ess);
+			changeAmount(sign, index, BigDecimal.valueOf(-item.getAmount()), ess);
 		}
 		final Integer exp = trade.getExperience();
 		if (exp != null)
 		{
-			changeAmount(sign, index, -exp.intValue(), ess);
+			changeAmount(sign, index, BigDecimal.valueOf(-exp.intValue()), ess);
 		}
 	}
 
@@ -289,22 +288,22 @@ public class SignTrade extends EssentialsSign
 		final BigDecimal money = trade.getMoney();
 		if (money != null)
 		{
-			changeAmount(sign, index, money.doubleValue(), ess);
+			changeAmount(sign, index, money, ess);
 		}
 		final ItemStack item = trade.getItemStack();
 		if (item != null)
 		{
-			changeAmount(sign, index, item.getAmount(), ess);
+			changeAmount(sign, index, BigDecimal.valueOf(item.getAmount()), ess);
 		}
 		final Integer exp = trade.getExperience();
 		if (exp != null)
 		{
-			changeAmount(sign, index, exp.intValue(), ess);
+			changeAmount(sign, index, BigDecimal.valueOf(exp.intValue()), ess);
 		}
 	}
 
 	//TODO: Translate these exceptions.
-	private void changeAmount(final ISign sign, final int index, final double value, final IEssentials ess) throws SignException
+	private void changeAmount(final ISign sign, final int index, final BigDecimal value, final IEssentials ess) throws SignException
 	{
 
 		final String line = sign.getLine(index).trim();
@@ -317,10 +316,10 @@ public class SignTrade extends EssentialsSign
 		if (split.length == 2)
 		{
 			final BigDecimal money = getMoney(split[0]);
-			final BigDecimal amount = BigDecimal.valueOf(getDouble(split[1]));
+			final BigDecimal amount = getBigDecimal(split[1]);
 			if (money != null && amount != null)
 			{
-				final String newline = Util.shortCurrency(money, ess) + ":" + Util.shortCurrency(amount.add(BigDecimal.valueOf(value)), ess).substring(1);
+				final String newline = Util.shortCurrency(money, ess) + ":" + Util.shortCurrency(amount.add(value), ess).substring(1);
 				if (newline.length() > 15)
 				{
 					throw new SignException("This sign is full: Line too long!");
@@ -336,7 +335,7 @@ public class SignTrade extends EssentialsSign
 			{
 				final int stackamount = getIntegerPositive(split[0]);
 				final int amount = getInteger(split[2]);
-				final String newline = stackamount + " " + split[1] + ":" + (amount + Math.round(value));
+				final String newline = stackamount + " " + split[1] + ":" + (amount + value.intValueExact());
 				if (newline.length() > 15)
 				{
 					throw new SignException("This sign is full: Line too long!");
@@ -350,7 +349,7 @@ public class SignTrade extends EssentialsSign
 				//TODO: Unused local variable
 				final ItemStack item = getItemStack(split[1], stackamount, ess);
 				final int amount = getInteger(split[2]);
-				final String newline = stackamount + " " + split[1] + ":" + (amount + Math.round(value));
+				final String newline = stackamount + " " + split[1] + ":" + (amount + value.intValueExact());
 				if (newline.length() > 15)
 				{
 					throw new SignException("This sign is full: Line too long!");

Essentials/test/com/earth2me/essentials/UserTest.java

@@ -70,13 +70,13 @@ public class UserTest extends TestCase
 	{
 		should("properly set, take, give, and get money");
 		User user = ess.getUser(base1);
-		double i = 100.5;
+		BigDecimal i = new BigDecimal("100.5");
-		user.setMoney(BigDecimal.valueOf(i));
+		user.setMoney(i);
 		user.takeMoney(new BigDecimal(50));
-		i -= 50;
+		i = i.subtract(BigDecimal.valueOf(50));
 		user.giveMoney(new BigDecimal(25));
-		i += 25;
+		i = i.add(BigDecimal.valueOf(25));
-		assertEquals(user.getMoney().doubleValue(), i);
+		assertEquals(user.getMoney(), i);
 	}
 
 	public void testGetGroup()